Updating title for SEO

Author: denzilribeiro

articles/postgresql/flexible-server/how-to-use-pgvector.md

@@ -1,6 +1,6 @@
 ---
-title: How to enable and use pgvector
-description: How to enable and use pgvector on Azure Database for PostgreSQL - Flexible Server.
+title: Vector search on Azure Database for PostgreSQL
+description: Vector search capabilities for retrieval augmented generation (RAG) on Azure Database for PostgreSQL .
 ms.author: avijitgupta
 author: AvijitkGupta
 ms.reviewer: kabharati